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nastya6klass12
@nastya6klass12
July 2022
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1. Решите уравнения:
а) х + 11,5 = 10,5
б) 5 + 3х = 8
в) 6х + 7 - 2х = 3
г) 4 : х = 2 : 2,5
пожайлуста хотя бы одно даю 26 баллов
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zhenyaM2002
Verified answer
Х + 11,5 = 10,5
х = 10,5 - 11,5
х= - (11,5 - 10,5)
х = - 1
===============
- 1 + 11,5 = 10,5
10,5 = 10,5
5 + 3х = 8
3х = 8 - 5
3х =3
х= 3: 3
х= 1
===========
5 + 3*1 = 8
5 + 3 = 8
8=8
6х + 7 - 2х = 3
(6-2) *х = 3 - 7
4х = - 4
х =(-4) : 4
х =-1
============
6*(-1) + 7 - 2*(-1)= 3
- 6 + 7 + 2 = 3
9 - 6 = 3
3 = 3
4 : х = 2 : 2,5
2*х = 4*2,5
2х= 10
х = 10 : 2
х = 5
============
4: 5 = 2: 2,5
0,8=0,8
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Answers & Comments
Verified answer
Х + 11,5 = 10,5х = 10,5 - 11,5
х= - (11,5 - 10,5)
х = - 1
===============
- 1 + 11,5 = 10,5
10,5 = 10,5
5 + 3х = 8
3х = 8 - 5
3х =3
х= 3: 3
х= 1
===========
5 + 3*1 = 8
5 + 3 = 8
8=8
6х + 7 - 2х = 3
(6-2) *х = 3 - 7
4х = - 4
х =(-4) : 4
х =-1
============
6*(-1) + 7 - 2*(-1)= 3
- 6 + 7 + 2 = 3
9 - 6 = 3
3 = 3
4 : х = 2 : 2,5
2*х = 4*2,5
2х= 10
х = 10 : 2
х = 5
============
4: 5 = 2: 2,5
0,8=0,8